Nicknamed Light, this solar energy newcomer (he made gloves before getting into solar in 2005) was riding high until October. The stock of his NYSE-traded LDK solar has tumbled almost 50% and is down 30% since we locked in net worths. The catalyst: an accounting officer who quit firm publicly alleged that LDK inflated inventory figures of a key raw material, polysilicon. The company and Peng deny allegations.